2nd, 6th and 7th Wisconsin, 19th Indiana, 24th Michigan
24th Michigan Monument Gettysburg Pa
I think you're incorrect. I believe it's for when you lose and you use it on the enemy. That would replicate the effect in the computer game.
I guess that my impression of the card is that it is only of use when you survive/win a battle and that the effects only target the enemy units in the flanks. Otherwise I can't quite figure this.